Introduction
Accurate estimation of electromagnetic (EM) velocity is critical in ground penetrating radar investigations. Not only does the velocity enable accurate time to depth image transforms, but the velocity is a direct measure of subsurface electrical properties that may be used to improve our understanding of the subsurface. When coupled with a suitable mixing equation, the velocity can be used to estimate dielectric permittivity which in turn may lead to estimates of pore fluid content (Greaves et al., 1996; Huisman et al., 2003; Topp et al., 1980). By acquiring continuous CMP profiles, it is possible to measure laterally and vertically continuous GPR velocity profiles (Greaves et al., 1996).
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2005. Society of Exploration Geophysicists
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